Bullet stacks (#3456)

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## About The Pull Request
Partial port of Mojave-Sun/mojave-sun-13#2076
and surrounding PRs
Adds bullet handfuls. You can only have the same type of ammunition in a
handful. No mismatched stacks
Spent casings are not stackable.

Generally, the rule is:
* By default, stacks can contain 12 rounds.
* Pistol-equivalent stacks contain 15 rounds.
* Shotshell stacks contain 8 rounds.
* Rifle stacks contain 15 rounds.
* Large calibre stacks contain 5 rounds.

Also replaces old ammo boxes with storage boxes that come pre-filled
with stacks of bullets like this:

![image](https://github.com/user-attachments/assets/cb71a690-cbd2-4973-bfca-4e8b9f472349)
Here's how the stacks look:

![image](https://github.com/user-attachments/assets/8cb64f4e-8b4c-4b87-9c60-96a8354a69de)

![image](https://github.com/user-attachments/assets/2b42e546-1d04-4542-b6dd-19c9099991e2)

## Changelog

:cl:
add: Added bullet stacks, they allow you to stack ammo of the same type
into a group.
balance: Changed old ammo boxes into storage items containing stacks of
bullets
/:cl:

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---------

Signed-off-by: thgvr <[email protected]>

_maps/RandomRuins/BeachRuins/beach_fishing_hut.dmm

@@ -67,6 +67,11 @@
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@@ -2186,9 +2186,9 @@ sz
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_maps/RandomRuins/BeachRuins/beach_treasure_cove.dmm

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_maps/RandomRuins/LavaRuins/lavaland_crashed_starwalker.dmm

@@ -92,7 +92,7 @@
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@@ -1301,7 +1301,7 @@
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_maps/RandomRuins/SpaceRuins/power_puzzle.dmm

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@@ -320,7 +320,7 @@
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_maps/RandomRuins/WasteRuins/wasteplanet_lab.dmm

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_maps/RandomRuins/WasteRuins/wasteplanet_pandora.dmm

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_maps/shuttles/independent/independent_rigger.dmm

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_maps/shuttles/nanotrasen/nanotrasen_harrier.dmm

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_maps/shuttles/nanotrasen/nanotrasen_ranger.dmm

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_maps/shuttles/pirate/pirate_tortuga.dmm

@@ -667,10 +667,7 @@
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